Which of the following is a Class A private IP address? MCQ with Answer and Explanation

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Which of the following is a Class A private IP address?

A. 127.0.0.1

B. 10.1.1.1

C. 192.168.1.1

D. 172.16.1.1

Answer: Option B

Solution (By JKSSB Mock Tests)

10.0.0.0/8 is Class A private range.

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Question #1

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What layer of the OSI model does a traditional hardware Router operate within to make path-forwarding decisions?

A. Physical Layer (Layer 1)

B. Data Link Layer (Layer 2)

C. Network Layer (Layer 3)

D. Transport Layer (Layer 4)

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Correct Answer: Option C

Explanation:
Routers operate at Layer 3 (Network Layer), analyzing logical IP addresses to direct data packets across networks.

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Question #2

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What type of device can look across diverse network layers to translate completely different protocol stacks, such as connecting a corporate LAN to a proprietary mainframe network?

A. Gateway

B. BNC Terminator

C. Repeater

D. Passive Switch

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Correct Answer: Option A

Explanation:
Gateways operate across multiple protocol layers to translate formatting and communication rules between completely different network architectures.

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